added a print menu item to the context menu of a wiki page

app/views/wiki/show.html.erb

@@ -39,6 +39,11 @@ See COPYRIGHT and LICENSE files for more details.
 <% @formatted_text = format_text (@content || @page.content), :text, attachments: @page.attachments  %>
 <% description strip_tags(@formatted_text) %>
 
+<% content_for :header_tags do %>
+  <meta name="required_script" content="print_handler" />
+<% end %>
+
+
 <%= toolbar title: title, html: {class: '-with-dropdown'} do %>
   <% if @editable %>
     <% if User.current.allowed_to? :edit_wiki_pages, @project %>
@@ -97,6 +102,11 @@ See COPYRIGHT and LICENSE files for more details.
       <% end %>
       <%= li_unless_nil(link_to_if_authorized(t(:label_history), {action: 'history', id: @page}, class: 'icon-context icon-activity-history')) %>
       <%= li_unless_nil(link_to_if_authorized(t(:button_manage_menu_entry), {controller: '/wiki_menu_items', action: 'edit', project_id: @project.identifier, id: @page}, class: 'icon-context icon-settings')) %>
+      <li>
+        <a class="icon-context icon-print op-wiki-context-print" title="<%= t('wiki.print_hint') %>">
+          <%= t(:button_print) %>
+        </a>
+      </li>
       <% if User.current.allowed_to?(:export_wiki_pages, @project) %>
         <section data-augmented-model-wrapper
                  data-modal-class-name="wiki-export---modal">

config/locales/en.yml

@@ -390,6 +390,7 @@ en:
   wiki:
     page_not_editable_index: The requested page does not (yet) exist. You have been redirected to the index of all wiki pages.
     no_results_title_text: There are currently no wiki pages.
+    print_hint: This will print the content of this wiki page without any navigation bars.
 
     index:
       no_results_content_text: Add a new wiki page

frontend/src/app/core/augmenting/dynamic-scripts/print_handler.js

@@ -0,0 +1,7 @@
+// we cannot just use print as the handler
+function print_wiki_handler() {
+  print();
+}
+
+jQuery(document.body).on('click', '.op-wiki-context-print', print_wiki_handler);
+